rauscher



(No Model.) 3 Sheets-Sheet 1;

E. P. RAUSCHER.

GOAL MINING MACHINE.

nted Jan. 5, 1897.

I k J W n 1 V A W A V -u v w 0 Y 1. F v, N

(N0 Modl.) 3 Sheets-Sheet 2. E. P. RAUSGHER. COAL MINING MACHINE.

No. 574,822. Patented Jan. 5, 1897.

UN TED; STATES PATENT OFFICE.

EDWARD P. RAUSCHER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE MORGAN-GARDNER ELECTRIC COMPANY, .OF SAME PLACE.

COAL-MINING MACHINE.

SPECIFICATION forming part of Letters Patent No. 574,822, dated January5, 1897.

Application filed April 23,1896. $eria1No.588,747. (No model.)

To ctZZ whom it may concern: as well as the mechanism for feeding theslid- Be it known that I, EDWARD P. RAUSCHER, ing frame and chainthereon into the work. a citizen of the United States of America, re-For this purpose a solid framework b is sesiding at Chicago, in thecounty of Cook and cured to the sliding frame at the rear end, 55 5State of Illinois, have invented certain new thereof which does notenter the channel cut and useful Improvements in Coal-Mining Maby themachine. This framework is seen in chines, of which the following is aspecificaend elevation in Fig. 2 and in section in Fig. tion. 3. Lookingat the latter figure it will be seen My invention relates to certainimprovethat a shaft 0 is journaled therein carrying 6o 10 ments inmining-machines of the class known upon its middle portion an armatureC, about as channeling:machines, said improvewhich are arranged thenecessary auxiliary ments being directed to the portions of the devicesto make up an electric motor, and at machine which feed the cuttingmechanism the lower end the same shaft carries a pininto the coal andreturn the same. ion 0, fast thereon in mesh with a gear-wheel 65 I 5The purpose of the invention is to provide d, fast upon a shaft 62,journaled in a bracket devices to protect the machinery from break- (2secured to the frame b, and also carrying age under an unusual strain,devices for aubelow the gear-wheel a sprockct-rs 'heel d and tomaticallyreversing the feed when the cutabove the bracket a Worm d". Thecuttingting mechanism has reached the limit of its chain passes aboutthe sprocket-wheel d and 7o movement into the coal, and devices for auisdriven thereby, and the worm-whcel d is tomatically stopping the feed atthe end of provided with suitable connections whereby the returnmovement. it moves the sliding frame B back and forth To such end theinvention consists in cerupon its stationary frame. tain novel featuresfully set forth in the fol- The thread upon the worm (Z is such that 7 5lowing description and defined in the appendthe movement of the sametends to raise the ed claims. worm, and said worm is movable up and downIn the drawings presented herewith, Figupon the shaft cl. To withstandthe tendure 1 is a plan of the portions of a miningency of movingupward, a washer E, of commachine necessary toillustrate myinvention.paratively weak material, as, for instance, 80

Fig. 2 is a section in line 2 2 of Fig. 1, lookcast-iron, is placed uponthe shaft, and above ing in the direction of the arrow 2 in said figthewasher a metal tube E is fitted upon the ure. Fig. 3 is a broken sectionin line 3 3 of shaft, the bottom of said tube being beveled the samefigure, looking in the direction of the and resting in a correspondingbeveled hole arrow 3. Fig. at is a broken plan, upon an enin the top ofthe washer E. The washer and 85 larged scale, of a portion of Fig. 1.Fig. 5 is tube are held down upon the worm by a nut a broken section inline 5 5 of Fig. 4, lookscrewed upon the end of the shaft d. This ing inthe direction of the arrow 5; and Fig. washer is made of such strengththat in case (3 is a broken section in line 6 6 of Fig. 4, any unusualobstruction is met with in the looking in the direction of the arrow 6.coal the washer will break before the other 90 0 Looking at Fig. 1, aframe A will be seen parts of the machine and protect the latter whichis stationary with respect to the work from injury. and which carries alongitudinally-sliding The worm d meshes with a suitable gear frame 13,guided by ways a in the frame A, F upon a shaft f, journaledhorizontally in and carryingin practiceacutting-chain which brackets d dand extending laterally across 5 extends completely around the frame andthe frame from side to side. At the opposite across the head 1) thereof,where it encounends of said shaft are'two gears f f, loose ters the coaland cuts the channel therein. upon the shaft and having upon their innerThis chain is not shown in the drawings for faces series of teeth fopposed to correthe reason thatit is a common feature of this spondingteeth g g upon collars G G, keyed no class of machines. The slidingframe l3 also upon the shaft f, but longitudinally movable carries thedriving mechanism for the chain thereon. These collars are spaced apartby lars being such that when one is in engage ment with one of the gearsthe other is thrown out of engagement with the gear upon the oppositeend of the shaft. The gear f meshes with a gear 71, fast upon a shaftII, also journaled in the brackets (1. Another gear h, fast upon thesame shaft, engages by means of an intermediate gear h with the gear fBecause of this intermediate gear the motion imparted to the shaft II bythe gear f is the reverse of the motion imparted by the gear The shaftll extends at both ends beyond the journals and without the same carriestwo gears 7L3 7L meshing with racks a a upon the stationary frame A. Toinsure the complete mesh with these racks, rollers X Y, journaled in thebrackets (1 are arranged upon the 0pposite sides of the racks. Therotation of the gears 71.3 7t" moves the sliding frame or carriage backand forth upon the stationary frame or base, and the reversible clutchcarried by the frame G and above described provides means for impartingthe desired motion to this feedin g device. To move this frame G backand forth to reverse the feed,a lever K is employed, which isbest shownin Figs. at and 5. This lever has an arm 75, pivoted to the frame G2 at70, avertical portion k j ournaled in brackets 70 upon the frame I), andan arm 75, extending laterally over the rack a. Upon this rack arearranged two pins or stops L L. (See Fig. 1, also Figs. 2, 23, and 4:.)These steps are so located that the arm b will engage the stop L whenthe carriage reaches the limit ofits motion into the coal and the stop Lwhen the carriage is wholly withdrawn therefrom.

In the drawings the carriage is shown as upon its return movement, theclutch being thrown to the left. \Vhen the arm reaches .the stop L, itwill disengage the clutch and stop the carriage.

At the right end of the frame G in Figs. 1 and 2 and at the top in Fig.4: will be seen a coiled spring Z, tending to crowd the clutch towardthe left in Figs. 1 and 2. To start the carriage into the coal, the arm7& is moved still farther away from the stop until the collar g engageswith the pinion f which starts the carriage on its inward movement. Whenthis movement is once made, the resistance of the carriage prevents thespring Z from disengaging the clutch until the inward movement iscompleted, when the disengagement is caused by the striking of the arm7& against the stop L, and as soon as the clutch is disengaged from theri ght-h and pinion the spring Z engages it with the lefthand pinion andstarts the return movement.

I claim as new and desire to secure by Letters Patent-- In a device ofthe class described, the com bination with the driven shaft, cl, andworm, d, longitudinally movable thereon, of the hollow washer, E,resting upon said worm and having a conical hole in its upper end, and acollar, E,havinga corresponding conical end resting in the conical holein the washer, whereby the collar, E, will split thewasher, E, beforesufficient strain is put upon the other portions of the machine toinjure the same; substantially as described.

EDXVARD P. RAUSGIlER.

\Vitnesses:

JAMES P. GARDNER, ROBERT RYAN.

